US Bridges

Il 1 over Trim Creek

Fair

Will County, Illinois · 4.5 M S of Il 394 · Structure no. 099007900000000

Built
1920
105 years old, rebuilt 1949
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
53 ft
1 main span
Daily traffic
4,800
2023 count
Owner
State
State Highway Agency

About this bridge

Il 1 over Trim Creek is a concrete tee beam carrying Il 1 over Trim Creek in Will County, Illinois. It was built in 1920 and reconstructed in 1949, so it is 105 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 4,800 vehicles a day, roughly 34% of them trucks, projected to reach 7,992 by 2046. The structure is 53 ft (16.2 m) long and 40 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesIl 1
CrossesTrim Creek
Location4.5 M S of Il 394
RouteState Highway 1
CountyWill County
StateIllinois
Coordinates41.32475, -87.62126
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97.9 US tons
Inventory rating59 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length53 ft (16.2 m)
Longest span51 ft (15.5 m)
Deck width40 ft (12.3 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,800 (2023)
Projected traffic7,992 by 2046
Trucks34%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$231,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Il 1 over Trim Creek built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1949.

What condition is Il 1 over Trim Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does Il 1 over Trim Creek carry?

About 4,800 vehicles per day (2023 count), of which roughly 34% are trucks.

How long is Il 1 over Trim Creek?

The structure is 53 ft (16.2 m) long with a longest span of 51 ft (15.5 m) and a deck 40 ft wide.

Who owns Il 1 over Trim Creek?

It is owned by the State Highway Agency.